京都大学 / 新制・課程博士 / 博士(工学) / 甲第24217号 / 工博第5045号 / 新制||工||1788(附属図書館) / 京都大学大学院工学研究科都市社会工学専攻 / (主査)教授 山田 忠史, 教授 藤井 聡, 准教授 SCHMOECKER Jan-Dirk / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

Regardless of the numeric base, scientific notation breaks numbers into three parts: sign, mantissa, and exponent. In this episode, we discuss how the computer stores those three parts to memory, and why IEEE 754 puts them together the way it does.

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Sverige i allmänhet och storstäderna i synnerhet har de senaste decennierna upplevt en tydlig bostadsbrist orsakad av ökad population och en omfattande urbanisering. Miljonprogrammet, Folkhemmet och Barnrikehus är historiska reformer med mål att möta tidigare bostadsbrist situationer. Idag står vi inför liknande problem där flera utsatta grupper har svårt att ta sig in den redan hårt konkurrensutsatta bostadsmarknaden. En tydligt utsatt grupp är studenter, där idag 21 av 38 högskolekommuner står med ett underskott av studentbostäder. Syftet med uppsatsen är att analysera affärsmöjligheterna för flytande studentbostäder i Sverige. Genom att observera de två planerade projekt som idag pågår i Sverige, samt intervjua aktörerna som är inblandade i dessa, ges olika perspektiv om de hinder och möjligheter som bostadsformen står inför. De redan utförda projekten för vanliga flytande bostäder som idag finns i Stockholm och Amsterdam som studeras närmare visar att flytande bostäder är tekniskt genomförbart. Även genom tidigare studier bekräftar den tekniska genomförbarheten för bostadsformen och fokus i denna studie kan därför riktas mot de juridiska och ekonomiska aspekterna. Det kan konstateras att det finns en potential för företag att satsa på flytande studentbostäder, men att det finns hinder för dessa bostäder att bli verklighet i större skala. Lagar, brist på färdigställda flytande studentbostäder som lämnar affärsmöjligheter oprövade samt små beställningar är några av de identifierade hindren. Vidare kan det fastslås att en viktig faktor för att boendeformen ska ses som lönsam i Sverige är att den uppförs för permanent bruk och därmed kategoriseras som vattenfastighet. / Sweden in general and the big cities in particular have experienced a clear housing shortage in recent decades characterized by increased population and extensive urbanization. “ Miljonprogrammet”, “Folkhemmet” and “Barnrikehus” are historical reforms aiming at quickly lessening the shortage of affordable housing. Today we are facing similar problems where several vulnerable groups find it difficult to enter the already competitive housing market. One of these groups are the students, where today 21 out of 38 university municipalities stand with a deficit of student housing. The purpose of the thesis is to describe the business opportunities of floating student housing in Sweden. By observing the two planned projects that exist in Sweden today, as well as interviewing the actors involved in these, different perspectives are given about the obstacles and opportunities that this housing form faces. The existing projects for ordinary floating housing, like those in Stockholm and Amsterdam, supports the technical achievability for this form of housing. Even through previous studies there is extensive evidence of technical feasibility and focus can therefore be directed towards the legal and economic aspects. It can be stated that there is a potential for companies to invest in floating student housing, but that there exists obstacles that prevent the housing form from becoming a reality on a larger scale. Current laws, lack of completed floating student housing projects that leaves unproven business opportunities and small orders are some of the identified obstacles. Furthermore, it can be stated that an important factor for the form of housing to be seen as profitable in Sweden is that it is erected in permanent use and thus categorized as water property.

The Fast Fourier Transform (FFT) converts time or spatial information into the frequency domain. The FFT is one of the most widely used digital signal processing (DSP) algorithms. DSPs are used in a number of applications from communication and controls to speech and image processing. DSPs have also found their way into toys, music synthesizers and in most digital instruments. Many applications have relied on Digital Signal Processors and Application Specific Integrated Circuits (ASIC) for most of the signal processing needs. DSPs provide an adequate means of performance and efficiency for many applications as well as robust tools to ease the development process. However, the requirements of important emerging DSP applications have begun to exceed the capabilities of DSPs. With this in mind, system developers have begun to consider alternatives such as ASICs and Field Programmable Gate Arrays (FPGA). Although ASICs can provide excellent performance and efficiency, the time, cost and risk associated with the design of ASICs is leading developers towards FPGAs. A number of significant advances in FPGA technology have improved the suitability of FPGAs for DSP applications. These advances include increased device capacity and speed, DSP-oriented architectural enhancements, better DSP-oriented tools, and increasing availability of DSP-oriented IP libraries. The thesis research focuses on the design of a single precision floating-point radix-4 FFT FPGA using VHDL for real time DSP applications. The paper will go into further detail pertaining to the FFT algorithm used, the description of the design steps taken as well as the results from both simulation and synthesis. / Electrical and Computer Engineering